Heat olive oil in a large skillet over medium heat.
Add diced onion and cook for 3 minutes until softened.
Add minced garlic and cook for 1 minute until fragrant.
Add ground beef to the skillet. Cook, breaking it apart with a spatula, until browned and cooked through, about 6-8 minutes.
Drain excess fat from the skillet if necessary.
Add diced green and red bell peppers, zucchini, and cherry tomatoes to the skillet. Stir to combine.
Sprinkle in ground cumin, smoked paprika, chili powder, dried oregano, black pepper, and salt. Stir well to evenly coat the ingredients with spices.
Cook for an additional 5 minutes, stirring occasionally, until vegetables are tender but still slightly crisp.
Remove skillet from heat and stir in chopped fresh cilantro.
Serve warm and enjoy your high protein, low carb meal.